If you aren't sure about the price, get quotes from other companies. That is the more common and appropriate way to shop/negotiate a price for something like HVAC. If anything I would get a cheaper quote and see if they would match, but HVAC is facing shortages and their schedules are pretty packed. Maybe get a detailed quote to see what they are charging for the unit(s) and how much for labor. Then you can maybe find out if they are overpricing something. I can second what TPlush is saying. I had been messing around with getting quotes for a new furnace for most of the year. I also had to do a new roof and did my driveway, so I was hoping to punt on the expense until next year. Mind you, I NEED a new furnace. Have gotten almost 25 years out of the current one, and the guy who does my maintenance recommended that I replace. I ran into a high school friend last week. In catching up, he told me works in purchasing for a company. They can't get product for their company. They have been waiting since January for a new company truck, for example. I mentioned my furnace issue. He said, "If they have one, grab it. If it breaks in December, they might not have one available to sell you." I went back to two vendors, and both as much told me, "This is the price. Take it or leave it." I took it. So, I'm getting a new furnace this month. TL, DR: With supply chain disruptions, you may not have much negotiating power. Multiple quotes is your way to get the best price. They may not move much.